Abstract: Reproduction errors are biased towards the mean of a stimulus set that varies along a perceptual dimension (Gu & Meck, 2011; Huttenlocher et. al., 2000). We investigated A) whether this central-tendency bias exists across sensory modalities (vision and audition), and B) how the bias unfolds over time. Visual and auditory stimuli were presented for durations ranging from 300 to 2800 ms...

Two key questions for investigators seeking to compare images across subjects are how to define a common coordinate system and how best to relate each subject to that coordinate system. We have developed a generalized expectation-maximization (EM) algorithm which iterates between estimating the most typical anatomy, assessing the typicality of each individual subject’s anatomy, and registering ...

This is the second article of a series on fundamental concepts in biostatistics and research. In this article, the author reviews the manner in which researchers characterize data. Normality, standard deviation, mean, P value, and other concepts related to parametric statistics are discussed in common language, with a minimum of jargon and mathematics, and with clinical examples. Emphasis is gi...